Long MSK300 – uninterruptible power, security panels and exit lighting – 300Ah 2V

In short: Here is the Long MSK300 in one line: UPS and standby systems, 300Ah 2V. Compare the code on your old battery with MSK300 before ordering.

Specifications table

Installation and maintenance tips

Telecom cabinets at the roadside see heat in summer and frost in winter. Check the UPS display after fitting new batteries. After a few years on float, most sealed standby batteries are due for replacement.

Batteries with the same format

Looking to compare? Each of these has the dimensions and polarity of the Long MSK300.

Ritar RL2300Ritar RL2400

Long MSK300: what it is and who it suits

Silent and ready for years: that is the life of the Long MSK300, rated 300Ah 2V. Spade terminals come in different widths, so check them closely. Search Long MSK300 and you reach this page directly.

Big reserve: 300Ah is high for UPS and standby systems. 21.2 kg is a modest weight for what it stores.

Questions buyers ask about the Long MSK300

Before you order: a quick checklist

• ✓ Built with AGM technology: if your vehicle or system was set up for another chemistry, check the charging settings first.
• ✓ Check 170 × 150 × 342.5 mm against the tray, not just the old battery.
• ✓ 300Ah sets how long the battery can power things with the engine off.

Related products and ranges

Finished comparing? Placing your order online takes a couple of minutes. Recycling the old battery is easy at most tips and garages.

• Compare alternatives for UPS and standby systems
• See every Long reference

How AGM batteries work and how to look after them

Tightly packed plates and mats give glass-mat batteries a sturdy inner structure. Cars with automatic engine stop love AGM, since it copes with constant partial discharge. Over winter, a smart unit set to its AGM programme keeps a glass-mat battery healthy with no effort.